Tuna, Atlantic Bluefin (Hon Maguro) 
Atlantic Bluefin Tuna is the largest tuna species and one of the largest fish in our oceans, growing to 1543 pounds and over 13 feet in length.
At least three populations exist in the Atlantic (western and eastern) and Mediterranean Sea, and after decades of exploitation all populations are considered overfished. The overall abundance of Atlantic Bluefin tuna is at a critical level and effective management and conservation goals are needed to protect the remaining fish.
Fishers use surface gears, typically rod and reel, longlines and purse-seines to target this highly valuable species. Little is known about bycatch associated with directed Atlantic Bluefin Tuna purse-seine fisheries, but tuna longline fisheries catch high numbers of finfish, sea turtles, and seabirds.
This fish may have high levels of mercury and PCBs that could pose a health risk to adults and children. More mercury and contaminant info here.